CN209180067U - To counter-rotating fan - Google Patents
To counter-rotating fan Download PDFInfo
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- CN209180067U CN209180067U CN201821672610.6U CN201821672610U CN209180067U CN 209180067 U CN209180067 U CN 209180067U CN 201821672610 U CN201821672610 U CN 201821672610U CN 209180067 U CN209180067 U CN 209180067U
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Abstract
The utility model discloses a kind of pair of counter-rotating fans, it include: the first order impeller and second level impeller of axially spaced setting, air-flow is blown by the direction of first order impeller towards the second level impeller when to counter-rotating fan operating, and the diameter of first order impeller is not identical as the diameter of second level impeller, the number of blade of the two is not also identical.The utility model is to counter-rotating fan, and since the diameter of first order impeller and second level impeller differs, the blade tip leakage vortex of an impeller of both stage impellers can be improved efficiency, be reduced noise by another impeller racemization.And to counter-rotating fan middle section after racemization, straight wind is formed, air supplying distance is farther；Wide relieve heat is formed to the peripheral regions of counter-rotating fan, wind sense is soft.
Description
Technical field
The utility model belongs to fan technology field, specifically a kind of pair of counter-rotating fan.
Background technique
Fan can accelerate the transmission of air-flow, realize wide relieve heat or improve fetch, accelerate wind speed, be a variety of living electric apparatus
In indispensable components.
The twin-stage aerofoil fan of existing tandem, two-stage fan size is identical, turns to identical or on the contrary, two-stage fan point
Not Pei Zhi a motor carry out driving rotation, and mostly in the intermediate arrangement fairing of two-stage fan, structure is complex, and
Noise is big.When two-stage fan is rotated towards different directions, the band rotational gas flow of first order fan outlet can be fanned by the second level
Leaf racemization, straight wind, accelerates air circulation out.But after the air quantity to second level fan of the first order fan of over commutation,
Wind-force and air quantity can be weakened.
And cancel the two stage fan after fairing, the flabellum of two-stage fan is completely open, the leaf top of first order flabellum
It will form stronger leaf top leakage whirlpool and pass airspeed so that the startup power in second level blade and blade top region generates huge fluctuation
It reduces, and increases noise, wind direction is also not wide enough in the case where air supplying distance is remote, and wind sense is not soft, using limited.
Utility model content
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model mentions
A kind of pair of counter-rotating fan out, described low to counter-rotating fan noise, air supply efficiency is high, takes into account remote air-supply and the closely effect of wide relieve heat
Fruit.
According to a kind of pair of counter-rotating fan of the utility model embodiment, comprising: the first order impeller of axially spaced setting
With second level impeller, air-flow when operating to counter-rotating fan is blown by the direction of the first order impeller towards the second level impeller
Dynamic, the diameter of the first order impeller is not identical as the diameter of the second level impeller.
According to the utility model embodiment to counter-rotating fan, since the diameter of first order impeller and second level impeller differs,
The blade tip leakage vortex of one impeller of both stage impellers can be improved efficiency, be reduced noise by another impeller racemization.And it is right
Counter-rotating fan middle section forms straight wind after racemization, and air supplying distance is farther；Wide relieve heat is formed to the peripheral regions of counter-rotating fan,
Wind sense is soft.
According to the utility model one embodiment to counter-rotating fan, leaf a height of H1 of the first order impeller, described second
The leaf a height of H2, H1 of grade impeller are unequal with H2；Wherein, the high H1 of leaf of the first order impeller is the half of the first order impeller
Difference between the radius of the wheel hub of diameter and the first order impeller, the high H2 of leaf of the second level impeller are the second level leaf
Difference between the radius of the wheel hub of the radius of wheel and the second level impeller.
Optionally, the ratio range of H2 and H1 is between 0.6~0.9.
Optionally, the ratio range of H2 and H1 is between 1.1~1.5.
According to the utility model one embodiment to counter-rotating fan, the blade quantity of the first order impeller and described second
The blade quantity of grade impeller is unequal.
According to passing through to counter-rotating fan, the first order impeller and the second level impeller for the utility model one embodiment
Same motor driven rotation.
According to the utility model one embodiment to counter-rotating fan, turn of the first order impeller and the second level impeller
Speed is unequal.
According to the utility model one embodiment to counter-rotating fan, further includes: shroud and two mesh enclosures, the mesh enclosure are circle
Shape, two mesh enclosures are connected to the opposite sides of the shroud, and the first order impeller and the second level impeller are located at institute
It states in shroud and the mesh enclosures of difference face two is arranged.
According to the utility model further embodiment, the shroud includes: ring muscle and multiple transverse bars, and the ring muscle is formed
For circular ring shape, multiple transverse bars are connected with the ring muscle respectively, the both ends of each transverse bar respectively with two mesh enclosures
It is connected.
According to the utility model further embodiment, further includes: column, the column are connected under the shroud
Side.
The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will
Become obvious and be readily appreciated that, in which:
Fig. 1 is the position to both stage impellers in counter-rotating fan and connection structure between the two of the utility model one embodiment
Relation schematic diagram.
Fig. 2 is the decomposition diagram of the both stage impellers of the utility model one embodiment.
Fig. 3 is the side structure schematic diagram to counter-rotating fan added with mesh enclosure and mask of the utility model one embodiment.
Fig. 4 is the general structure schematic diagram to counter-rotating fan of the utility model one embodiment.
Fig. 5 is the air-flow schematic diagram to counter-rotating fan under operating of the utility model one embodiment.
Fig. 6 is the air-flow schematic diagram to counter-rotating fan under operating of another embodiment of the utility model.
Appended drawing reference:
To counter-rotating fan 100；
Motor 10；
Shroud 20；Transverse bar 201；Ring muscle 202；Mesh enclosure 21；Column 22；
First order impeller 30；First wheel 31；First blade 32；
Second level impeller 40；Second wheel hub 41；Second blade 42.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model
Limitation.
Below with reference to Fig. 1-Fig. 6 describe the utility model embodiment to counter-rotating fan 100.
According to a kind of pair of counter-rotating fan 100 of the utility model embodiment, as shown in Figure 1 and Figure 2, comprising: axially spaced
The first order impeller 30 and second level impeller 40 of setting.Optionally, the rotation direction of first order impeller 30 and second level impeller 40
On the contrary.
When operating to counter-rotating fan 100, air-flow is blown by the direction of first order impeller 30 towards second level impeller 40, i.e., to rotation
When fan 100 operates, first order impeller 30 is air draught side, and second level impeller 40 is blowing side, and first order impeller 30 is located at second
In the wind field of grade impeller 40, the operating of first order impeller 30 significantly affects the generation of second level impeller 40.
The diameter of first order impeller 30 is not identical as the diameter of second level impeller 40, the different both stage impellers of diameter, is formed
Blade tip leakage vortex mutually avoid, therefore the blade tip leakage vortex of at least one impeller, to reduce noise, can be mentioned by racemization
High efficiency.Here, the diameter of first order impeller 30 can be greater than the diameter of second level impeller 40, the diameter of first order impeller 30
The diameter of second level impeller 40 can be less than.
As shown in figure 5, it has two benefits when the diameter of first order impeller 30 is greater than the diameter of second level impeller 40.
First benefit is that the diameter of second level impeller 40 is smaller, and the leaf top that can avoid the generation of first order impeller 30 is let out
Leak whirlpool.Since the blade tip leakage vortex of first order impeller 30 avoids the entire blade of second level impeller 40, second level impeller
40 blade surface pressure will not generate huge pulsation, can reduce noise.
Second point benefit is that the band rotational gas flow that the rotation of first order impeller 30 generates, only some enters second level impeller
40, into second level impeller 40 this fraction by 40 racemization of second level impeller, therefore the outlet air of second level impeller 40 is flat
Straight wind, air supplying distance are remote.And the air-flow on the outside of 40 outer diameter of second level impeller, not by racemization, therefore this fraction dissipates,
Wind direction is wider.Thus, it is possible to take into account wider array of wind direction while meeting remote straight wind.
As shown in fig. 6, can also be taken into account straight remote when the diameter of first order impeller 30 is less than the diameter of second level impeller 40
The purpose of distance air-supply and wide relieve heat.Specifically, the band rotational gas flow that the rotation of first order impeller 30 generates is in second level impeller 40
It is middle by racemization, therefore the outlet air of the intermediate region of second level impeller 40 is straight wind.Second level impeller 40 is located at first order leaf
30 exterior portions are taken turns, the air-flow of generation relatively dissipates, and wind direction is wide, forms wide relieve heat.
Specifically, every one stage impeller all has wheel hub and blade, hereinafter make to illustrate it is clear, as shown in Figure 5, Figure 6, claim
The wheel hub of first order impeller 30 is first wheel 31, and the blade of first order impeller 30 is referred to as the first blade 32, claims second level impeller
40 wheel hub is the second wheel hub 41, and the blade of second level impeller 40 is referred to as the second blade 42.
In some embodiments of the utility model, as shown in figure 2, figure 5 and figure 6, a height of H1 of the leaf of first order impeller 30,
The leaf of second level impeller 40 a height of H2, H1 is unequal with H2.Wherein, the high H1 of the leaf of first order impeller 30 is first order impeller 30
The high H1 of difference between radius and the radius of first wheel 31, i.e. leaf is the maximum radial dimension of the first blade 32.Second level leaf
The high H2 of leaf of wheel 40 is the difference between the radius of second level impeller 40 and the radius of the second wheel hub 41, i.e. the high H2 of leaf is the second leaf
The maximum radial dimension of piece 42.Here, H2/H1<1 or H2/H1>1.
Here the rotation for mainly passing through blade when impeller operation forms field of wind-force, utilizes both stage impellers in above-described embodiment
Blade radial size difference, after keeping the radial field of wind-force of two impellers overlapping, preferably reduction first order impeller 30 is let out
Leak the noise of second level impeller 40 caused by whirlpool.
In some embodiments, as H2/H1 < 1, preferably the ratio range of H2 and H1 are limited between 0.6~0.9.
Because if H2/H1 > 0.9, second level impeller 40 is difficult to avoid the blade tip leakage vortex of first order impeller 30.And if H2/H1 <
0.6, then the diameter of second level impeller 40 is too small, air quantity decaying can be too serious, cause to the air-out volume of counter-rotating fan 100 compared with
Small, air supplying distance shortens.
Certainly, the height ratio of blading value of first order impeller 30 and second level impeller 40 can also be arranged in other embodiments
H2/H1 < 0.6 can promote second level impeller at this point, reducing bring wind loss to make up 40 diameter of second level impeller
40 revolving speed.
In further embodiments, as H2/H1 > 1, preferably by the ratio range of H2 and H1 be limited in 1.1~1.5 it
Between.If H2/H1 < 1.1, the relieve heat air quantity of the outer ring of second level impeller 40 is too small, wide relieve heat it is ineffective.If H2/
H1 > 1.5, then the straight wind air quantity of inner ring is too small, straight wind air supplying distance is insufficient.
In some embodiments of the utility model, the blade quantity of first order impeller 30 and the blade of second level impeller 40
Quantity is unequal.The quantity of first order impeller 30 and second level impeller 40 is unequal, can avoid both stage impellers and generates when rotated
Resonant belt carrys out more noises.
In some embodiments of the utility model, as shown in Figure 1, first order impeller 30 and second level impeller 40 pass through together
The driving rotation of one motor 10.Driving rotation is carried out using single motor 10, can further decrease and make an uproar to the entirety of counter-rotating fan 100
Sound, and simplify the structure to counter-rotating fan 100.
Specifically, the both ends of motor 10 are stretched out along axial direction is equipped with motor shaft, one end of motor shaft connects the second wheel hub 41,
The other end of motor shaft connects first wheel 31 by planetary gear mechanism.It is operated using planetary gear mechanism, compact-sized, transmission is flat
Surely, noise is lower when rotated for second level impeller 40 and first order impeller 30, selection of the rotary rpm than that can pass through transmission mechanism
And it adjusts.
Optionally, first order impeller 30 and second level impeller 40 can be driven by a motor 10 respectively, such revolving speed
Control is more easier.
In some embodiments of the utility model, the revolving speed of first order impeller 30 and second level impeller 40 is unequal.Turn
The unequal both stage impellers of speed, can be further reduced resonance, the diameter alternatively, it is also possible to make up both stage impellers is unequal and brings
The air quantity to counter-rotating fan 100 reduction.
In some embodiments of the utility model, as shown in Figure 3 and Figure 4, further includes: shroud 20 and two mesh enclosures 21,
Mesh enclosure 21 is circle, and two mesh enclosures 21 are connected to the opposite sides of shroud 20, and first order impeller 30 and second level impeller 40 are located at
In shroud 20 and difference two mesh enclosures 21 of face are arranged.Both stage impellers, motor 10 are coated on inside by shroud 20, play protection
Effect, mesh enclosure 21 break up outlet air more, enhance the comfort and range of outlet air in the case of not influencing fetch, improve
Nearby experienced to the wind sense of wind.
Optionally, as shown in Figure 3, Figure 4, shroud 20 includes: ring muscle 202 and multiple transverse bars 201, and ring muscle 202 is formed as round
Annular, multiple transverse bars 201 are connected with ring muscle 202 respectively, and the both ends of each transverse bar 201 are connected with two mesh enclosures 21 respectively.Ring muscle
202 and transverse bar 201 can enhance the local stiffness of shroud 20, and provide support for mesh enclosure 21, be easily installed mesh enclosure 21 in shroud 20
On.
Wherein, the circumferentially spaced setting of multiple transverse bars 201 being arranged on shroud 20, this shroud 20 are equivalent to a circle lattice
Grid, when fan periphery relieve heat, windage is smaller.
Optionally, as shown in Figure 4, further includes: column 22, column 22 are connected to the lower section of shroud 20.Column 22 is sustainable
Both stage impellers make to dry to counter-rotating fan 100 within doors in vertical be placed in.
For the scheme for being best understood from the utility model embodiment, one of the utility model is described below with reference to Fig. 1-Fig. 5
To the structure of counter-rotating fan 100 in specific embodiment.
As Figure 1-Figure 5, a kind of pair of counter-rotating fan 100, comprising: first order impeller 30, second level impeller 40, shroud 20,
Mesh enclosure 21, column 22.Wherein first order impeller 30 and the axially spaced setting of second level impeller 40, both stage impellers are by same
Motor 10 carries out driving rotation, i.e. first order impeller 30 and second level impeller 40 is separately mounted to motor 10 towards axially extending electricity
The both ends of arbor.First order impeller 30 and second level impeller 40 are disposed opposite to each other, and the diameter of first order impeller 30 is greater than the second level
The diameter of impeller 40, the high H1 of the leaf of first order impeller 30 be greater than second level impeller 40 the high H2 of leaf, and H2/H1 0.6~0.9 it
Between, first order impeller 30 is dried towards the direction of second level impeller 40.The number of blade of first order impeller 30 and second level impeller 40
Unequal with revolving speed, wherein the number of blade of first order impeller 30 is 7, and the number of blade of second level impeller 40 is 8.
For electric fan, the range of H1 and H2 is the range of common electric fan, generally 6 inches to 20 inches it
Between.
First order impeller 30, second level impeller 40, motor 10 are placed in shroud 20 and two mesh enclosures 21 of face are arranged respectively,
Mesh enclosure 21 is connected to the opposite sides of shroud 20.Column 22 is connected to the supported underneath of shroud 20 entirely to counter-rotating fan 100.
In the description of the present invention, it should be understood that term " on ", "lower", " rear ", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction " is that orientation based on the figure or position are closed
System, is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, " first order impeller ", " first " for limiting in " second level impeller ", " second " can be expressed or impliedly
Including one or more of the features, for distinguishing Expressive Features, point of out-of-order, point of no weight.
In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
The impellers of seven, eight blades is shown in Fig. 4 for illustration purposes, but those of ordinary skill is readding
After having read technical solution above, it is clearly understood that in the technical solution that the program is applied to the blade of other quantity,
This also falls within the protection scope of the utility model.
According to the connection of other compositions such as both stage impellers and motor to counter-rotating fan 100 of the utility model embodiment,
And the rotatable engagement and the principle of both stage impellers racemization etc. of both stage impellers are all for those of ordinary skills
It is known, it is not detailed herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Description means that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained in the utility model
In at least one embodiment or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical
Embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be implemented in any one or more
It can be combined in any suitable manner in example or example.
While there has been shown and described that the embodiments of the present invention, it will be understood by those skilled in the art that:
These embodiments can be carried out with a variety of variations, modification, replacement in the case where not departing from the principles of the present invention and objective
And modification, the scope of the utility model are defined by the claims and their equivalents.
Claims (10)
1. a kind of pair of counter-rotating fan characterized by comprising the first order impeller and second level impeller of axially spaced setting,
Air-flow is blown by the direction of the first order impeller towards the second level impeller when operating to counter-rotating fan, the first order
The diameter of impeller is not identical as the diameter of the second level impeller.
2. according to claim 1 to counter-rotating fan, which is characterized in that leaf a height of H1 of the first order impeller, described
The leaf of sencond stage impeller a height of H2, H1 is unequal with H2；Wherein, the high H1 of leaf of the first order impeller is the first order impeller
Difference between the radius of the wheel hub of radius and the first order impeller, the high H2 of leaf of the second level impeller are the second level
Difference between the radius of the wheel hub of the radius of impeller and the second level impeller.
3. according to claim 2 to counter-rotating fan, which is characterized in that the ratio range of H2 and H1 is between 0.6~0.9.
4. according to claim 2 to counter-rotating fan, which is characterized in that the ratio range of H2 and H1 is between 1.1~1.5.
5. according to claim 1 to counter-rotating fan, which is characterized in that the blade quantity of the first order impeller and described the
The blade quantity of sencond stage impeller is unequal.
6. according to claim 1 to counter-rotating fan, which is characterized in that the first order impeller and the second level impeller are logical
Cross same motor driven rotation.
7. according to claim 1 to counter-rotating fan, which is characterized in that the first order impeller and the second level impeller
Revolving speed is unequal.
8. according to claim 1 to counter-rotating fan, which is characterized in that further include: shroud and two mesh enclosures, the mesh enclosure are
Circle, two mesh enclosures are connected to the opposite sides of the shroud, and the first order impeller and the second level impeller are located at
In the shroud and the mesh enclosures of difference face two are arranged.
9. according to claim 8 to counter-rotating fan, which is characterized in that the shroud includes: ring muscle and multiple transverse bars, described
Ring muscle is formed as circular ring shape, and multiple transverse bars are connected with the ring muscle respectively, the both ends of each transverse bar respectively with two
The mesh enclosure is connected.
10. according to claim 8 to counter-rotating fan, which is characterized in that further include: column, the column are connected to described
The lower section of shroud.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821672610.6U CN209180067U (en) | 2018-10-15 | 2018-10-15 | To counter-rotating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821672610.6U CN209180067U (en) | 2018-10-15 | 2018-10-15 | To counter-rotating fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209180067U true CN209180067U (en) | 2019-07-30 |
Family
ID=67361456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821672610.6U Active CN209180067U (en) | 2018-10-15 | 2018-10-15 | To counter-rotating fan |
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| Country | Link |
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| CN (1) | CN209180067U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112752908A (en) * | 2019-01-31 | 2021-05-04 | 美路株式会社 | Air circulator with double rotary wings |
| US20220034326A1 (en) * | 2019-01-31 | 2022-02-03 | Miro Co., Ltd. | Air circulator having dual rotary vane |
| CN114688049A (en) * | 2020-12-25 | 2022-07-01 | 广东美的白色家电技术创新中心有限公司 | Fan subassembly and air conditioner |
-
2018
- 2018-10-15 CN CN201821672610.6U patent/CN209180067U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112752908A (en) * | 2019-01-31 | 2021-05-04 | 美路株式会社 | Air circulator with double rotary wings |
| US20220034326A1 (en) * | 2019-01-31 | 2022-02-03 | Miro Co., Ltd. | Air circulator having dual rotary vane |
| CN114688049A (en) * | 2020-12-25 | 2022-07-01 | 广东美的白色家电技术创新中心有限公司 | Fan subassembly and air conditioner |
| CN114688049B (en) * | 2020-12-25 | 2024-02-20 | 广东美的白色家电技术创新中心有限公司 | Fan assembly and air conditioner |
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